You have 212 packages (9.1%) supported until April 2019 (Community - 3y)
You have 49 packages (2.1%) supported until April 2021 (Community - 5y)
You have 1989 packages (85.6%) supported until April 2021 (Canonical - 5y)

You have 2 packages (0.1%) that can not/no-longer be downloaded
You have 71 packages (3.1%) that are unsupported

I never tested headphones. It didn't work with the internal speakers, but when I pulled up the sound settings and played something, it said sound was playing. I backed up everything to an external hard drive and reinstalled the Ubuntu partition. It works now.